Malicious PDF — malware analysis report

Static analysis result for SHA-256 98da2333e89d438b…

MALICIOUS

PDF

73.2 KB Created: 2021-03-25 12:21:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f3bffe5bd9c0c48f06a0675208bff7de SHA-1: 13ab3b2491793a9aef42bc5471db8baaccb9feaa SHA-256: 98da2333e89d438be5246e22a18072d7bfa0075e838acafeeb0cfb6447005f29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to generate traffic or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/wix?keyword=chrome+os+linux+usb+support PDF link annotation
    • https://kepigepejabuji.weebly.com/uploads/1/3/4/3/134315220/254b24.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzijaxab/jgfmVdF/99053514414.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/bhg1ibW/dark_side_of_the_moon_transformers_names.pdfIn PDF document text
    • https://xijegasafofid.weebly.com/uploads/1/3/0/8/130815381/1733c8a069b75c.pdfIn PDF document text
    • https://debugifepini.weebly.com/uploads/1/3/1/0/131070476/xitasenive.pdfIn PDF document text
    • https://wuzinetasinozud.weebly.com/uploads/1/3/1/6/131606123/juvanusufazov_napuwudoz_tobejuvipave_wujoxutot.pdfIn PDF document text
    • https://toxilitabosi.weebly.com/uploads/1/3/4/4/134495834/8995212.pdfIn PDF document text
    • https://gupamawuma.weebly.com/uploads/1/3/4/6/134602371/zozuroferafexaj.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/b1b8fadc.pdfIn PDF document text
    • https://cdn.sqhk.co/razanifuwuz/xQid9ja/gnese_da_alma_cairbar_schutel.pdfIn PDF document text
    • https://wupebeziwemipi.weebly.com/uploads/1/3/5/3/135315897/2026d9ad.pdfIn PDF document text
    • https://nakidero.weebly.com/uploads/1/3/4/5/134524904/baruxafefenuwixal.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/AjaGjgg/jasimazidimowasijezure.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/UnwcvnP/.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/liguwubore/23218329608.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/78478867578.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/pizon.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/nuxedipezamimuziv.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/xizizulediponaba.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04F 4960 bytes
SHA-256: 864ebf39a623643ac6ba01905b4b59e64ffdca787033be31805f98263dfc6b6f
font_01_sfnt_off0000f100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 11552 bytes
SHA-256: 89d533243d6eb6e4a8b81ad48fad479122fa0483e428e40e86414f117f517094

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